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Optimized vascular network by stereolithography for tissue engineered skin.

Xiaoxiao Han1, Julien Courseaus2, Jamel Khamassi2,3,4

  • 1Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, UK.

International Journal of Bioprinting
|October 26, 2020
PubMed
Summary

This study presents an optimized vascular network design for tissue engineering, fabricated using stereolithography. The engineered vessels improve nutrient supply and reduce cell death in vitro.

Keywords:
additive manufacturingartificial vascular networkdesign optimisationskin tissue engineeringstereolithography

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Vascular Biology

Background:

  • Tissue engineering requires functional vascular networks for nutrient and waste transport.
  • Existing scaffolds often lack the complexity to mimic physiological vascular systems.
  • Optimizing vascular structures is crucial for long-term tissue viability.

Purpose of the Study:

  • To design and fabricate an optimal vascular network for tissue engineering applications.
  • To ensure the vascular network meets comprehensive physiological requirements at micro and macro scales.
  • To validate the performance of the engineered vascular network in vitro.

Main Methods:

  • Development of an optimized vascular network design considering physiological conditions.
  • Fabrication using stereolithography with biocompatible, elastic, and bio-coatable photocurable resins.
  • In vitro assessment of cell viability within hydrogel scaffolds containing the engineered vascular network.

Main Results:

  • The optimized vascular network maximizes nutrient supply and minimizes recirculation zones.
  • Wall shear stress within the engineered vessels remains within a healthy physiological range.
  • In vitro studies demonstrated the lowest cell death rate in hydrogels with the optimized vascular network compared to controls.

Conclusions:

  • The developed design and fabrication methods are effective for creating complex artificial vascular networks.
  • This approach shows significant potential for advancing tissue engineering and regenerative medicine.
  • Optimized vascularization is key to improving the survival and function of engineered tissues.